New York: John Wiley & Sons, 1897, 1898. Hardcover. viii, 234, ads, vii, 319p., ads, both with extensive diagrammatic illustrations and tables with numerous folded plates all of which in good shape. Hardbounds in matching format: 9x6 inch brown cloth boards ruled in blind and titled gilt. Sound condition, a little edgeworn and handled, lower corners slightly frayed on v.II with doodling on the final blank, penned notes at the back of v.III: clean within except for neat ownership legends, good copies sold as a pair.